Multiple disk filter



March 1952 c. J. FUSCO MULTIPLE DISK FILTER 2 Sl-lEETS-SHEE'I' 1 Filed Nov. 23, 1945 INVENTOR 614240 J 5.52:0

March 25, 1952 c. J. Fusco MULTIPLE nzsx FILTER Filed Nov. 23, 1945 INVENTOR.

C'AWLO F0560 Patented Mar. 25, 1952 UNITED STATES PATENT OFFICE MULTIPLE DISK FILTER Carlo J. Fusco, Chicago, Ill.

Application November 23, 1945, Serial No. 630,355

2 Claims. 1

My invention relates to filters and relates more particularly to filter presses of the type utilizing a plurality of filter sheets and filter plates.

The principal object of my invention is to provide an improved construction of multiple disc filter composed of a minimum number of different parts and so arranged that assembly or disassembly is easily and quickly accomplished.

A further object of my invention is to provide an improved low cost filter having a large filter area and adapted to be easily dis-assembled to increase or decrease the filter area.

A further object is to provide an improved filter sheet of such shape and so arranged in the press that there is practically no waste of material in making the sheets.

Afurther object is to provide sheets of the type described and co-operating plates so constructed that individual sheets and plates are accurately and rigidly supported and clamped together, but when the clamping means are loosened each sheet or plate may be lifted out of the assembly, or additional plates and sheets added quickly and easily- Other objects and advantages will be more apparent from the following description wherein reference is had to the accompanying two sheets of drawings, upon which Fig. 1 is a side .elevational view of my improved filter;

Fig. 2 is a. cross-sectional view thereof taken on the lines 22 of Fig. 4;

Fig. 3 is a similar sectional view thereof taken on the lines 33 of Fig. 4;

Fig. 4 is a generally longitudinal sectional view of the. filter taken generally. in the plane of Fig. 1, with parts broken away in section to more clearly show other parts, and

Fig. 5 is a cross-sectional view of a modified form of filter sheet.

In the embodiment of the invention which I have chosen to illustrate, in Fig. 1 I have shown a supporting framework which may include the upright post members l0 and I2 provided with suitable base plates l4 and I6. Two of the uprights In and two of the uprights 12 are provided. A shelf 18 of sheet metal or other material may be suitably secured to the four posts and extend forward to provide a platform for a pump 20.

At the upper end of the post I0 I provide the cross-frame member 22 and at the upper end of the posts I2 I provide a similar cross-frame member 24. The back cross-frame member 22 may be provided with a medially disposed stop member 26. Parallel rods 28 and 34 may connect the 2 members 22 and 24 and form a support for the filter plates and sheets later to be described.

The filter unit may consist of two similarly shaped end plates 32 and 34, in-plates .36, outplates 38, and filter sheets 49. The end plate 32 is provided with a pair of tapped openings 42 and 44 to receive inlet and outlet conduits 4B and 48. This plate is also provided with a centrally disposed boss 50 which, when the plates are clamped together, is pressed against the pad 26 on the cross-frame 22. The bore 42 may have a passageway 52 connected thereto and communicating with a shallow depression 54 in the wall of the plate which terminates short of the bore 54.

The out-plates 38, as most clearly shown in Fig. 2, are provided with bores 42a and 44a adapted to be aligned with the bores 42 and 44 when the plates are hung in position on the rods 28 and 30. I provide hook members 56 and 58 on both end plates, the inand out-plates and the filter sheets for the purpose of supporting them on the side rails 28 and 30. The out-plate 38 is further provided on both faces with a plurality of rows of humps 60 and passageways 62 and 64 communicating with the bore 440..

Each of the in-plates 36 is provided with a bore 42b and 44b aligned with the bores 42 and 44 and passageways 56 and 6B communicating with shallow depressions 10 upon opposite sides of the plate.

The filter sheets 46 comprise filter paper of any desirable thickness, but preferably sufficiently rigid to be self-supporting when placed upon. the side rails 28 and 30. These sheets are also provided with openings 42c and 4:40 aligned with the bores 42 and 44. The front end plate 34 has a passageway 52a and chamber 5.4a. similar to the end plate 32.

With the construction provided, when a plurality of filter sheets 40, inand out-plates 36 and 38 and two end plates 32 and 34 are assembled together, the material to be fitered will enter the filtering unit through conduit 46, and as shown by the arrows, pass downwardly through the various filter sheets and out through the conduit 48.

In order to firmly hold the filter unit assembly together, I have provided a clamping mechanism which may include the hand wheel 14, the screw member 16, and the thrust member 18 rotatably secured to the forward end of the screw 16. The screw 16 may s-crew-threadedly engage a tapped bore 24a in a suitable boss in the frame member 24. A pan may be disposed on the platform l8 below the filter unit to receive any material which may be spilled or wasted during operation or during change of filter plates.

From the above and foregoing description it can be seen that I have provided a filter ruiit construction which is comparatively simple in operation and which is comparatively simple to manufacture and assemble. The speed with which filtering may be done will depend upon the number of filter sheets employed, and this may be easily and quickly varied by turning the handwheel 14 and either placing more filter sheets and plates on the support rods 28 and 30 or removing them.

Another advantage of this construction lies in the fact that practically the entire stock from which the filter sheets are made can be utilized because of the shape which I employ for both the filter sheets and the plates.- By reason of the square construction and the hook members 55 and 58, only small corner sections of the paper are removed in the stamping of the sheets from the material. Since filter sheets must be frequently changed, the most important maintenance cost of a filter unit lies in the supplying of new filter sheets, and with my construction, the medium form which the sheets are made is almost 100% utilized.

In Fig. I have illustrated a modified form of filter wherein the filter sheets 4| are formed slightly different from those previously described. In this construction, and for the purpose of more easily centering the sheets upon the support rods 28a and 39a, the sheet M is provided with an arcuate groove 5| at the right side, and a pair of outwardly projecting ears 43 and 45. The opposite side of the sheet has a single ear 4! and an arcuate edge 49 which is on a radius from the center of the rod 30a. In placing these sheets between the filter plates, the groove 5| and ears 43 and 45 are filtered about the rod 30a, and the sheet is then swung downwardly in an arc until the ear 4'! seats upon the rod 28a.

With this construction it can be seen that the sheets are very easily centered upon the support rods so that the inlet and outlet openings 42c and 440 are more accurately aligned. It will of course be understood that the inand out-plates 36 and 38, as well as the end plates 32 and 34 may be of the same shape as the filter sheet 41.

While I have illustrated and described a specific embodiment of the invention, it will be apparent to those skilled in the art that changes and modifications may be made in the exact details shown, and I do not wish to limit myself in any particular; rather what I desire to secure and protect by Letters Patent of the United States is:

1. A filter unit comprising a supporting frame having a pair of front upright post members and a pair of back upright post members, a crossbrace horizontally connected between said pair of front upright post members and a similar crossbrace connected between said pair of back upright post members, a pair of parallel horizontally disposed rod members connected between the two front and the two back cross-braces, a front and a back end plate, a fluid inlet conduit and a fluid outlet conduit connected to said back end plate, a medial boss on each of said end plates, the boss on said back end plate positioned against said back cross-brace, a plurality of generally square, similarly shaped filter plates and filter sheets, each filter plate and each filter sheet having hook members formed thereon by removing small portions thereof at opposite corners within the square, said 'hook members terminating in parallel side edges and adapted to engage on said rods to support said filter plates and filter sheets thereon, the rods being adjacent the parallel side edges and said plates and sheets being supported by gravity upon said rods, said plates and sheets having openings therein aligned with said fluid inlet and outlet, and clamping means screwthreadedly mounted in said front cross-brace adapted to bear against the boss on said front end plate to assemble said end plates, filter plates and filter sheets in operative relation against the boss on said back end plate.

2. A filter unit comprising a supporting frame having a pair of front upright post members and a pair of back upright post members, a crossbrace horizontally connected between said pair of front upright post members and a similar cross-brace connected between said pair of back upright post members, a pair of parallel hori zontally disposed rod members connected between the two front and the two back crossbraces, a, front and a back end plate, a fluid inlet conduit and a fluid outlet conduit connected to said back end plate, a medial boss on each of said end plates, the boss on said back end plate positioned against said back cross-brace, a plurality of generally square, similarly shaped filter plates and filter sheets, each filter plate and each filter sheet having hook members formed thereon by removing small portions thereof at opposite corners within the square, said hook'members adapted to engage on said rods to support the same thereon, said plates and sheets having openings therein aligned with said fluid inlet and outlet, and clamping means screw-threadedly mounted in said front cross-brace adapted to bear against the boss on said front end plate to assemble said end plates, filter plates and filter sheets in operative relation against the boss on said back end plate.

CARLO J. FUSC'O.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 92,465 Needham et a1. July 13, 1869 321,947 Breyer July 14, 1885 638,949 Ackermann -Dec. 12, 1899 887,349 Sellenscheidt May 12, 1908 1,240,385 Sweetland Sept. 18, 1917 1,589,834 Bisbee June 22, 1926 2,076,049 Seitz Apr. 6, 1937 2,122,259 McKenna June 28, 1938 2,480,732 Hendrickson Aug. 30, 1949 

